Rare three-body decay t -> c h gamma in the standard model and the two-Higgs doublet model

Abstract

A complete calculation of the rare three-body decay t --> c h gamma is presented in the framework of the standard model. In the unitary gauge, such a calculation involves about 20 Feynman diagrams. We also calculate this decay in the general two-Higgs doublet model (model III), in which it arises at the tree-level. While in the standard model the decay t --> c h gamma is extremely suppressed, with a branching fraction of the order of $10^{-15}$ for a Higgs boson mass of the order of 115 GeV, in the model III it may have a branching ratio up to $10^{-5}$. We also discuss the crossed decay h --> b \bar{s} gamma.

arXiv commentUpdated to match published version

References in corpus (30)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• HDECAY: a Program for Higgs Boson Decays in the Standard Model and its Supersymmetric Extension
• Topcolor Assisted Technicolor
• Phenomenology of Two Higgs Doublet Models with Flavor Changing Neutral Currents
• A new evaluation of the t->cH decay width in the standard model
• Flavor Changing Scalar Interactions
• FCNC top quark decay in the MSSM: a door to SUSY physics in high luminosity colliders?
• A New Model of Topcolor-Assisted Technicolor
• Flavor-changing Top Quark Decays In R-Parity Violating SUSY
• Flavor changing interactions mediated by scalars at the weak scale
• New Supersymmetric Contributions to $t->cV$
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Flavour Changing Neutral Currents, Weak-Scale Scalars and Rare Top Decays
• Flavour changing top decays in supersymmetric extensions of the standard model
• Review of Top Quark Physics
• Top-Quark Decay Via Flavor-Changing Neutral Currents at Hadron Colliders
• Loop Induced Flavor Changing Neutral Decays of the Top Quark in a General Two-Higgs-Doublet Model
• Flavour changing top quark decay within the minimal supersymmetric standard model
• The rare top quark decays $t\to cV$ in the topcolor-assisted technicolor model
• B_s --> γγdecay in the two Higgs doublet model with flavor changing neutral currents
• Testing flavor-changing neutral currents in the rare decays t->cViVj
• The Rare Top Decays $t\to b{W}^{+}Z$ and $t\to c{W}^{+}{W}^{-}$
• The t->WZb decay in the Standard Model: A Critical Reanalysis
• Finite Width Effects in Top Quark Decays
• Flavor changing t -> c l_1^- l_2^+ decay in the general two Higgs doublet model
• Higgs Boson Flavor-Changing Neutral Decays into Bottom Quarks in Supersymmetry
• t -> c H^0 decay in the general two Higgs doublet model
• Dominant Three-Body Decays of a Heavy Higgs and Top Quark
• The rare top decay $t\to cg$ in topcolor assisted technicolor models
• The flavor changing top decay t-->c+sneutrino or sneutrino-->t+c(bar) in the MSSM without R-parity

Cited by in corpus (3)

• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Higgs mediated lepton flavor violating tau decays $\tau \to \mu \gamma$ and $\tau \to \mu \gamma \gamma$ in effective theories
• Flavor changing Flavon decay $\varphi \to tc$ ($\varphi =H_F,A_F$) at the High Luminosity Large Hadron Collider